Apple Mac Performa 5300CD - Manual (Page 113)

8 Gently pull down on the wire handle and swing it out to unlock it from its storage
position. Then grasp the handle and pull the logic board out of the computer.
The vertical plate and the logic board to which it’s attached slide all the way
out of the computer. Carefully support the logic board as it comes out, and
put it on a stable, clean, flat surface.
Wire handle
103 Installing an Expansion Card